Facebook: your IP address is public

See that header in your Facebook notification email that looks like this?
    X-Facebook: from zuckmail ([NzYuMTY5LjIzLjU2])
That's your friend's IP address:
    % perl -MMIME::Base64 -le 'print decode_base64("NzYuMTY5LjIzLjU2")'
    76.169.23.56


as of I wrote this entry, it still there.
source: http://jwz.livejournal.com/1234802.html